Abstract

The flow due to a rotating disk decelerating with an angular velocity
inversely proportional to time with either surface suction (or injection)
which again varies with time is investigated. The unsteady Navier-Stokes
equations are transformed to non-linear ordinary differential equations
using similarity transformations. The resulting equations are solved
numerically using a globally convergent homotopy method. The flow depends
on two non-dimensional parameters, namely an unsteadiness parameter S and
a suction (or injection) parameter A. Some interesting numerical results
are presented graphically and discussed.